666435165 has 32 divisors (see below), whose sum is σ = 1224460800. Its totient is φ = 306112320.

The previous prime is 666435163. The next prime is 666435191. The reversal of 666435165 is 561534666.

It is not a de Polignac number, because 666435165 - 2¹ = 666435163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666435163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103155 + ... + 109424.

It is an arithmetic number, because the mean of its divisors is an integer number (38264400).

Almost surely, 2^666435165 is an apocalyptic number.

It is an amenable number.

666435165 is a deficient number, since it is larger than the sum of its proper divisors (558025635).

666435165 is a wasteful number, since it uses less digits than its factorization.

666435165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212617.

The product of its digits is 388800, while the sum is 42.

The square root of 666435165 is about 25815.4055749663. The cubic root of 666435165 is about 873.4793353628.

The spelling of 666435165 in words is "six hundred sixty-six million, four hundred thirty-five thousand, one hundred sixty-five".